Rename RippleAPI client to Client (#1520)

* rename RippleAPI -> XrplClient

* more renames

* move API stuff to client folder

* rename all api -> client

* fix tests

* make tests run

* fix integ tests

* fix urls

* fix merge issues

* XrplClient -> Client

* fix merge issues

* rename xrpl-client npm symlink to xrpl-local

test/client/prepareEscrowExecution/index.ts

@@ -0,0 +1,78 @@
+import {TestSuite, assertRejects, assertResultMatch} from '../../utils'
+import requests from '../../fixtures/requests'
+import responses from '../../fixtures/responses'
+const instructionsWithMaxLedgerVersionOffset = {maxLedgerVersionOffset: 100}
+
+/**
+ * Every test suite exports their tests in the default object.
+ * - Check out the "TestSuite" type for documentation on the interface.
+ * - Check out "test/client/index.ts" for more information about the test runner.
+ */
+export default <TestSuite>{
+  'prepareEscrowExecution': async (client, address) => {
+    const result = await client.prepareEscrowExecution(
+      address,
+      requests.prepareEscrowExecution.normal,
+      instructionsWithMaxLedgerVersionOffset
+    )
+    assertResultMatch(
+      result,
+      responses.prepareEscrowExecution.normal,
+      'prepare'
+    )
+  },
+
+  'prepareEscrowExecution - simple': async (client, address) => {
+    const result = await client.prepareEscrowExecution(
+      address,
+      requests.prepareEscrowExecution.simple
+    )
+    assertResultMatch(
+      result,
+      responses.prepareEscrowExecution.simple,
+      'prepare'
+    )
+  },
+
+  'prepareEscrowExecution - no condition': async (client, address) => {
+    await assertRejects(
+      client.prepareEscrowExecution(
+        address,
+        requests.prepareEscrowExecution.noCondition,
+        instructionsWithMaxLedgerVersionOffset
+      ),
+      client.errors.ValidationError,
+      '"condition" and "fulfillment" fields on EscrowFinish must only be specified together.'
+    )
+  },
+
+  'prepareEscrowExecution - no fulfillment': async (client, address) => {
+    await assertRejects(
+      client.prepareEscrowExecution(
+        address,
+        requests.prepareEscrowExecution.noFulfillment,
+        instructionsWithMaxLedgerVersionOffset
+      ),
+      client.errors.ValidationError,
+      '"condition" and "fulfillment" fields on EscrowFinish must only be specified together.'
+    )
+  },
+
+  'with ticket': async (client, address) => {
+    const localInstructions = {
+      ...instructionsWithMaxLedgerVersionOffset,
+      maxFee: '0.000396',
+      ticketSequence: 23
+    }
+    const result = await client.prepareEscrowExecution(
+      address,
+      requests.prepareEscrowExecution.normal,
+      localInstructions
+    )
+    assertResultMatch(
+      result,
+      responses.prepareEscrowExecution.ticket,
+      'prepare'
+    )
+  }
+}